Weighing scale



NOV. 1 1 H. S. BERGEN WEIGHING S CALE Filed Feb. 18, 1920' 2Sheets-Sheet l H. S. BERGEN WEIGHING SCALE Nov. 11 1924. 1,514,826

Filed Feb. 18, 1920 2 Sheets-Sheet 2 Patented Nov. l1, 19224.

UNITED-STATES PATENT OFFICE.`

HAEEY s. BERGEN, or TOLEDO, OHIO, AssIeNoE To TOLEDO scALE coMT'ANY, OETOLEDO, 01110,; GOEPOEATION'OE NEW JERSEY.

WEIGHING SCALE.

Application led February 18, 1920. Serial No. 359,552.

To all 'whom t may concern.' Be it known that I, HARRY S. BERGEN, acitizen of the United States, residing at Toledo, in the county of Lucasand State of Ohio, have invented certain new and useful Improvements inWeighing Scales, of which the following 'is a specification.

My. invention relates to improvements in weighing scales, particularlyscales having an index so connected to the weighing mechanism as to bemoved thereby over a relatively stationar chart to indicate the weightof the load on t e commodity-receiver of the scale. Such scales usuallyhave a platform or base which is designed to be set upon a'levelsurface, and any deviation of such surface -from a horizontal planenecessitates leveling the scale base by means of adjustingscrews or thelike.

It is an object of this invention to so mount the chart that any4.movement of the weighing mechanism of the scale and consequentmovement of the indicator due to the scales being out of level will becompensated for by a corresponding movement of the chart. l

-Other objects and advantages will beapparent from the followingdescription, in which .reference is had to the accompanying N drawingsillustrating a preferred embodiment of my invention and in vwhichsimilar reference numerals designate similar parts throu hout theseveral views.

Int e drawings l 7 l 86 Figure 1 is a. front elevation of a `.scaleembodying my invention;

Figure 2 is a front elevationd of the scale shown in Figure 1 with the'housing .revmoved; y

Figure 3 is an end elevation Of a portion of the lever mechanism Off thescale;

Figure 4 is a vertical sectional view taken sulstantially on the line .44 of Figure 2; an

v Figure 5 isA a sectional plan.l view taken' Vsubstantially on the line5-5 of Figure'2. Forthe sake of clearance of description I have shown myinvention as appliedto a scale of the even-balance ty e and my inl0 lvention is particularly applicable thereto. It

is to be understood, however, lthat the in- Q vention may be applied toscales of other types, and I contemplate using it wherever.

`ing notched to receive grooved bearings 3 which are suitably secured inplace therein.

Rockably supported upon the grooved bearings 3 are the aligned fulcrumpivots 4Iof the main lever 5 of the scale. The main lever 5 is of thefirst class and the ends thereof are forked, as at 6, and carry upturnedknife edge load pivots 7. The commodit -receiving pans 8 of the scaleare supporte by spiders 9 having downwardly-extending spider stems 10which pass between the forks at the ends of the lever 5. Extendingtransversely of the lever 5 adjacent each end thereofis a bar 11, eachof said bars being rigidly.. secured to one of the spider stems L0. Theends of the bars 11 are turned downwardly, as shown in Figure 3, and thedownturned ends thereof are notched to receive inverted grooved bearings12 which rests upon the uptnrned edges of the load pivots The lower endsof the spider stems 10 are pivoted to the ends of check links 13 whichextend from their ivotal connections with the stems 10 towardp eachother and are pivoted to a short `standard14 secured at the center ofthe upper side of the base l. The

pivotal connection between the links 13 and the standards 14 lies in thesame vertical plane withl the axis of the fulcrum 4, and the distancebetween the pivots on each of the links is the same as the distancebetween the fulcrum 4 andthe corresponding load pivot 7. Linesconnecting the fulcrum and load pivots and the pivotal connections ofthe links 13 form a parallelogram and the links' 13 therefore serve tomaintain the stems 10 in vertical position without injuriouslyaffootingv the weighing operations of the scale.

It will be noted upon -inspection of Fi re 4 that an arm 15 branchesfrom each o the fulcrum stands 2 some distance below the .1- end thereofand extends inwardly and upwardly, terminating in line'with the upi perends of the fulcrum stands. The upper ends of the arms 15 are similar inconstruction to the upper ends of the standards 2, being notched toreceive grooved bearings 16. Rockably supported in the grooved bearings16 is the downturned knife edge pivot 17 of a pendulum 18 having a stemv19 and a heavy bob 20. A fan-shaped chart 21 is secured to the pendulum18 to swing therewith andthe bob'20 of the pendulum carries a threadedrod 22 upon which is mounted a movable weight 23. By turning the weight23 upon the rod 22 the center of mass of the pendulum may be shifted andthe position of the chart 21 thereby adjusted until its zero graduationis directly above the fulcrum of the main lever.

In order to provide room for properly mounting the pendulum 18 and theparts connected therewith, the central portionof the lever 5 is expandedand an oval opening 24 is formed therein. Mounted upon the lever 5 oneach side of the opening 24 is an index hand 25 which extends upwardlyat substantially right angles to the lever 5 and indicates the zerograduation on the chart 21 when the lever 5 is horizontal. Should thebase 1 of the scale be thrown out of level the lever 5 will. move tohorizontal position and the pendulum 18 will at the Sametime swing untilits center of mass is directly beneath the axis of its pivot 17. Theaxes of the fulcrum pivots of the lever 5 and the pivot 17 ofthe'pendulum are in alignment so that the relative positions of theindex 25 and the chart 21 will be the same as bechart 2 1 is providedagainst by means of. a,

:fore the scale was thrown out of level.

Undue vibration of the lever 5 is prevented by provision of a dash potl26 having a reciprocating plunger therein connected by means of a link27 to the lever 5, and undue swinging of the' pendulum 18 and dashpotk28 having a plunger therein which is connected through the hnk 29 toanfarm 30, the arm 30 being rigidly secured to the pendulum 18. Thelever mechanism of the scale is protected by a box-like housing 31having windows 32 in its sides to dis lay the weighing mechanism. Asubstantially fan-shaped chart casing 33, the dimensions of which aregreat enough to allow limited swinging movement of the chart and which`fulfill the objects primarilystated, it is to be understood that theinvention is susceptible to variation, modication and change within thespirit and scope of the subjoined claims.

Having described my invention, I claim:

1. In a scale, in combination, weighing mechanism, an indicatorconnected thereto, an upwardly-extending chart adapted to cooperatevwith said indicator, and gravitycontrolled automatic means to positionthe said chart to correspond to the position of the weighing mechanismwhen the scale is out of level.

2. In a scale, in combination, weighing mechanism, an indicatorconnected thereto, a pivotally-mounted chart ada ted to co-opcrate withsaid indicator, .an depending from said chart to automatically positionthe same to correspond to the position of the weighing mechanism whenthe scale is out of level.

3. In a scale, inI combination, a lever, anl

co-operate with said indicator, and means to position said chart tocorrespond with the position of said lever whenv the scale is ont oflevel.

5. In a scale, in combination, alever, an indicator connected to saidlever, a pendulum, and .a chart ixed to said pendulum and adaptedtoco-operate with sald indicator said pendulum being pivoted on an axiscoinciding with the pivotal axis of the lever fulcrum.

6. In a scale, in combination, a lever, an upstanding indicator handfixed upon said lever, an upright pendulated chart pivoted on an axiscoinciding' with the pivotal axis of the lever fulcrum and av pendulumfixed to said chart. b v l 7. In a scale, in combination, a lever'fulcrumed atits center, an upstanding indica-l tor hand fixed upon saidlever, an upright s chart pivoted on an axis coinciding with the pivotalaxis of the'lever ulcrum and a pendulum ixed to said chart.

8. In a scale, in combination, a lever having a central opening therein,a pivoted chart extending through said opening and a pendulum ixed tosaid chart.

9. In a scale, in combination, a air of fulcrum stands, a leverfulcrumed t ereon, said lever having an opening therein,

a pendulum branches on said stands extending-into said opening, a chartpivpted upon said branches and a pendulum fixed to said chart.

10. In a' scale, in combination, weighing mechanism, an indicatorconnected thereto, a pivoted chart co-operating with said indicator, apendulum: ixed to said chart and means for damping swinging movement ofsaid pendulum.

11, In a scale, in combination a. lever, an 12. In a scale, incombination, a pivoted indicator connected thereto, 'a plvoted chartchart, a horizontally-extending arm xed 10 co-operating with saidindicator, a pendu-` thereto, and a dash pot retardng device lum fixedto said chart, a dash pot retardconnected to seid arm.

5 ing device for damping the movement of l HARRY S. BERGEN.

said lever, and a, dash pot retarding device Witnesses: for damping themovement 'of said chart C. E. WILCox,

and pendulum. C. 0. MARSHALL.

